12 awg should be fine but go 10 awg if you can afford it.
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Yes 90a but i will run an dual 6374 motor for my setup So I think I will need to go lower.
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For a dual 6374 you will probably want something more thicker than 12 awg but i dont have much knowledge with dual motor setups so maybe some else can give what wire they are using and how many amps their using?
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Look in the “Maximum amps for chassis wiring” column and remember that’s continuous and for slightly longer runs of wire than we use in a tiny esk8, so we can exceed that by a bit, but I wouldn’t go too far over that. I personally don’t exceed those numbers at all on the battery side and exceed them no more than 100% on the motor phase wire side
https://www.powerstream.com/Wire_Size.htm
So for example 12AWG is good for 41A battery current and 82A motor current (the way I do it)
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I have a question, so my board could reach top speed when I had 83 mm wheels but now that I put 110 mm wheels on it, it runs out of juice so quick but then 20 mins later can do the same thing. Is there anyway I can fix this discharge problem maybe add another battery?
What is your battery and what is your regen amps that you have set up.
Changing from 83 to 110 is a pretty big jump. What’s your gear ratio and KV? It may need to be adjusted to compensate for such a big change.
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So this connector Can handle a lot there is no info.
It looks like it uses xt-60s and they are specified to handle 60 amps
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just finshed my battery pack😀
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yes it is. that was my first pack 
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Lovely work.
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This is a subject too lengthy to answer here my friend. I politely suggest some serious research and read time. Its all here for the taking.
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Nice first go 
. Small suggestion maybe cover the exposed bits to prevent accidental short circuits.
Thanks for the support. This is my next one although i am waiting on 50 more 30q’s to build a monster 10s 10p pack. I 3d printed spacers and they also act as insulators between the p groups
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Did you solder all of them instead of spot welding
I dont have a spot welder but i hae a good idea
im going to use bradided copper wire. I tested how strong the connection is after soldering it and i could not rip it off. It will also stand up to the current load and is flexable and easy to work with
Is it possible to use an RC style remote to control your ESC? I already have this remote laying around: http://www.hpiracing.com/en/part/105381 and ifI could gut it and use it, it would save me a lot of money.
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Yes any rc remote will work